Man if you saw the endless wailing and gnashing of teeth about every single change that happens iteration to iteration you'd be astounded.
The two subfranchises, modern warfare and black ops do generally feel substantially different though. Modern warfare is generally a slog, but black ops can be quite zoomy, especially now that Raven software is working on them.
That's just gaming. It doesn't matter what developers do, some portion of the playerbase will be mad about it. Nerf a thing, someone gets mad, don't nerf it someone else gets mad. I'm sure some people will get mad at both options.
